Introduction to HDM-4

摘要

1. HDM-4 is based on a well established economicrnanalysis frameworkrn2. Models derived from large scale field experimentsrnconducted world-wide, but local adaptationrnessentialrn3. International standard tool for road sectorrnplanning and managementrn4. Provides a common framework for analysis ofrnroad management optionsrn5. International and regional technical supportrnbehind HDM-4 through HDMGlobal